Additional basespeaker options

https://github.com/myshell-ai/OpenVoice/assets/119748743/7e8dc67f-6d07-4729-97b8-af4bd5f4f680

 ### 

>  @`****` hh
Hi. This seems like a good project, certainly the demo files seem to work well. 

When I input my own file with a british accent, the basespeaker is too far away for me to get anything usable. 

I don't want to go down the OpenAI route, as that's pay to play. Instead, Melo looks interesting, but the install appears to be docker only for windows, which makes it unusable. 

Are there other options? Perhaps a new batch of base accents, or code for another TTS that could be used as base? 

Thanks in advance.